Errors in Measurement 量度的誤差
This applet is modified from an applet by Anthony Or.
Chinese version: https://www.geogebra.org/material/show/id/wv3ytdqf
English version: https://www.geogebra.org/material/show/id/sZN7kF7J
gMath 互動數學教室
http://www.gmath.hk